Type 1 - Very Light Oils (Jet Fuels, Gasoline); API(15ºC)>45.0
Type 2 - Light Oils (Diesel, No. 2 Fuel Oil, Light Crudes); 35.0>API(15ºC)>17.5
Type 3 - Medium Oils (Most Crude Oils); 17.5 >API(15ºC)> 10.0
Type 4 - Heavy Oils (Heavy Crude Oils, No. 6 Fuel Oil, Bunker C);API(15ºC)< 10.0